Temperature-regulator.



L. D. VAUGHAN.

TEMPERATURE REGULATOR.

APPLICATION FILED JUNE 24,1916.

1,226,381. Patented Mar. 27, 1917.

2 SHEETS-SHEET L L. D. VAUGHAN. TEMPERATURE REGULATOR.

APPLICATION FILED JUNE 24. I916- Patented Mar. 27, 1917. 2 SHEETS-SHEET 2.

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LEVIN ID. VAUGHAN, 0F PHILADELPHIA, PENNSYLVANIA.

TEMPERATURE-REGULATOR.

Specification of Letters Patent.

Patented Mar. 2W3, 1291?.

Application filed June 24, 1916. Serial No. 105,583.

.710 all whom it may concern:

Be it known that I. Lnvm D. VAUGHAN, a citizen of the United States, residing at Philadelphia, in the county of Philadelph1a and State of Pennsylvania, have invented certain new and useful Improvements in Temperature-Remllators, of which the following is a specification.

My invention relates to an improved mechanism to be applied to boilers, hot water heaters and the like, for the purpose of automatically putting on, or shutting off, the draft at a predetermined time.

The objects of the invention are the provision of a temperature regulator operated and controlled by means of the expansion and contraction caused by the varying temperature of the water, which is simple and durable in its construction and which will operate in a positive manner to control the draft and regulate the fire, and such other and further objects as may hereinafter appear.

For a full understanding of the invention and the merits thereof and also to acquire a knowledge of the details of construction and the means for effecting the result, reference isi to be had to the following description, and accompanying drawings, in

Figure 1 isa front view of a boiler with the device attached,

Fig. 2 is a cross sectional View of the device in place,

Fig. 3 is a view of the diaphragm,

Fig. 4% is a view of the fuse wire used to retain the diaphragm in position,

Similar reference figures refer to similar parts throughout the drawings Referring to said drawings the numeral 10 represents a pipe connection to the boiler, or source of water supply, said pipe being threaded on its upper portion to receive a Y shaped joint 11.

@ne angle of said Y shaped joint 11, being a continuation of the water supply, by means of the pipe 1, and the other connections as shown, carries the water to the radiators.

Threaded into the upper portion of the other angle of said Y shaped joint 11 is the expansion chamber 13. This chamber is cast in one piece, having an overhanging hexagonal head 15' and is exteriorly threaded, for a short distance beneath said hexagonal head, to receive the threads of an angle of the a shaped joint 11, and terminates in a sloping form to a rounded base, so that when the device is in operative position a space is provided on each side of said chamber 13 for the circulation of water from the boiler, or other source of supply.

A ledge or seat is formed by the upper rim of said chamber 18. On this ledge and against the inside wall of the hexagonal head is positioned a diaphragm 14. This diaphragm is constructed of any suitable material but in my experiments I have obtained the best results from the use"of phosphor bronze. Said diaphragm is sealed in position by means of fuse wire 18, thus forming a sealed chamber beneath said dia phragm. This chamber is filled with the necessary quantity of denatured alcohol, mercury or other suitable cxpaudible and non-freezing fluid.

While mercury is generally used in this conection I have, in my experiments, obtained better results from the use of denatured alcohol, which also is more economical.

The diaphragm 14 should be of such material and construction as will readily respond, by expansion and contraction, to the varying temperature of the water.

The hexagonal head of chamber 13 is interiorly threaded to the depth of the diaphragm 14 to receive the exterior threads on the bushing 15", said member 15 at its center of height being hexagonal. I

A piston rod 16 terminates in the piston head, which is a solid, the shape of a cone frustum, with its base rounded to its slanting side so that when actuated upon by the diaphragm, the contact with said piston head covers only a small central area of the base of said piston head. A bushing 15 acts as a support for the saddle or yoke 19. Said bushing 15 is hollowed out to form a ground joint with piston head so that leakage isprevented.

The yoke 19, projecting laterally upon opposite sides of the piston rod guide and having upwardly extending arms 20 and 23, secured thereto by means of lock nuts as illustrated, is fastened to the bushing 15 by means of lock nuts 42. Through member 15" passes piston rod 16.

The upwardly extending arni 20 is bifurcated at its upper end to receive loosely the lever 22; which in this instance is a horizontally disposed beam pivotally mounted, at an intermediate point, .upon a pin 21. The upwardly extending arm 23 is slit to act as a guide for said lever 22 and to allow in a piston head as before stated, said piston head normally resting, or in contact with, the diaphragm l4. Adjusting nuts 17 are threaded on the upper end of said piston rod 16 as illustrated. The lever 22 has attached thereto in any suitable manner the weight 24.

A flexible chain or cord 25 is secured to an opening in the lever 22 and extends down and is fastened to a ring on the ash pit door 40 as illustrated. Also secured to an open ing in said lever 22 is a connection to the flue damper as shown.

Briefly the operation of my device is as follows:

The device being attached and in place, the lever 22 is adjusted by means of a weight or weights 2% for a predetermined degree of temperature. When this degree of temperature is reached, the water circulating around the chamber 18, containing denatured alcohol, mercury or other expandible fluid, causes such fluid to expand thereby expanding diaphragm l-t, which action actuates the piston 16 against the lever 22, raising said lever, which action closes ash pit door and as well the damper in the fine.

As the temperature lowers thelever gradually, in unison with the contraction, descends and opens the ash pit door and due damper.

The piston rod 16 is adjusted by means of the adjusting nuts 17, before commencing the operation, in such a manner that it contacts with, and is actuated by, the diaphragm, but so that it will not be forced against the same by the action of the lever 22 in its ascent and descent.

I do not restrict myself to the exact details of construction, combination and arrangement herein set forth, it being obvious that minor variations thereof not involving the exercise of invention may be made by the skilled mechanic, and such departure from what is herein described and claimed not involving invention I consider as within the scope and terms of my claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a temperature regulator, the combination with a boiler of a thermostatic chain her, connected to the water circulation therefrom. east in one piece and having an over.- hangii hexagonal head, interiorly threaded to "t ie depth. of the diaphragm, a diaphragm, means for positioning said diaphragm on a ledge formed by the run on the upper part of said chamber sealing the chamber therebeneath, means for causing an expansion of said diaphragm, a bushing exteriorly threaded to engage the interior threads of the hexagonal head aforesaid, a yoke, having upwardly extending arms adapted to actas guides for a lever,-mounted on said bushing, a piston rod passing through an opening in said yoke and througi said bushing and held in contact with said dia; phragm by adjusting means carried, by said piston rod and terminating in a piston head, which is a solid, the shape of a cone frus- .tu1n, with its base rounded to its slanting side so that when actuated by the diaphragm the contact with said piston head coveis only a small area of the base of said piston head, a balanced lever pivotally mounted, at an intermediate point, on r pin through one of the arms of said yoke and in contact with the upper termination of said piston so that, when the piston is actuated by the expansion, of the diaphragm it will elevate said lever.

2, In a temperature regulator, the combination with a boiler of a. thermostatic chamher, connected to the water circulation therefrom, east in one piece and havin an overhanging hexagonal head, interior threaded to. the depth of the diaphragm, a diaphragm, means for positioning said diaphragm on' a ledge formed by the rim on the upper part of said chamber sealing the chamber therebeneath, means for causing an expansion of said diaphragm, a bushing ex teriorly threaded to engage the interior threads of the hexagonal head aforesaid, a

yolte, having upwardly extending arms adapted to act as guides for a lever, mounted on said bushing, a piston rod passing through an opening in said yoke and through said bi'lshing and held in contact with said diaphragm by adjusting means carried by said piston rod and terminating in a piston head, which is a solid the shape of a cone frustum, with its base rounded to its slanting side so that when actuated by the diaphragm the contact with said piston head coversonly a small area of the base of said piston head, a balanced 'lever pivotally mounted, at an intermediate point, on a pin through one of the arms of said yoke and in contact with the upper termination of said piston so that when the piston. is actuated by the xpansion of the diaphragm it will elevate said lever and means i or preventing leakage.

in testimony whereof I aihx my signature in presence of two witnesses.

LEVIN n. VAUGHAN.

Witnesses James S. Cmrronn, M. VAN BUOSKIRK. 

